When I'm eating time in a patrol area waiting for targets to show up and I'm also in an area agressively patrolled by the enemy, I will use 22ft deck awash and set 3 knots diesel speed. This lets me loiter a very long time without giving up mobility, fast acceleration and nearly instant diving time. The wake is minimal at this speed.
Conservation theory asside, it's my practice to conserve very aggressively on the way to the 1st patrol area so I can spend what I've saved being more aggressive and evasive in the patrol area.
-Pv-
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